EP2539684B1 - Test chamber for explosion resistant products - Google Patents
Test chamber for explosion resistant products Download PDFInfo
- Publication number
- EP2539684B1 EP2539684B1 EP11702474.5A EP11702474A EP2539684B1 EP 2539684 B1 EP2539684 B1 EP 2539684B1 EP 11702474 A EP11702474 A EP 11702474A EP 2539684 B1 EP2539684 B1 EP 2539684B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- test chamber
- chamber according
- explosion
- test
- explosion resistant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 238000004880 explosion Methods 0.000 title claims abstract description 40
- 238000004891 communication Methods 0.000 claims abstract description 5
- 239000002360 explosive Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
- F42D5/045—Detonation-wave absorbing or damping means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
Definitions
- Another advantage offered by the invention is that the possibility to simulate non-hermetic environments allows to design explosion resistant products according to their real intended use, thus avoiding an unneeded and expensive oversizing thereof.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Glass Compositions (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
- The present invention relates to a test chamber for testing and certifying explosion resistant products.
- It is known that in order to sell explosion resistant products in the European Community it is necessary that the products bear a "CE" marking ensuring that the required reliability and quality Community standards are met.
- In particular, the Italian safety standard, legislative decree 81/2008, and the related safety standards 99/92/CE and 94/9/CE require that these products, such as e.g. panels for making walls, doors and windows, be tested in special test chambers inside which explosions suitable to artificially reproduce the conditions of a real explosion, pressure conditions in particular, are simulated.
- Test chambers, e.g. known from patents
US 2659235 andUS 7406806 , are generally comprised of containers so configured to allow to air-tightly mount a product to be tested in such a way that the product forms a portion of the surfaces subjected to the explosion that is simulated. Inside the chamber an explosive charge, which is triggered from the outside by way of a suitable control system, is arranged. The walls of the test chambers are so sized to withstands the high pressures generated by an explosion without being deformed, so that it is possible to concentrate the effects of the simulated explosions on the tested product only. -
DE 19617697 discloses a test chamber according to the preamble ofclaim 1. - In known test chambers all the tests are carried out under substantially static conditions in which the pressure generated by the explosion reaches maximum values in times in the order of milliseconds and remains substantially unchanged until when the chamber is opened in order to allow to remove the tested product.
- On the contrary, in the case of a real explosion the pressure trend immediately after the explosion is generally very different. A real environment in fact is not generally hermetic and, for this reason, after having reached a peak value pressure diminishes more or less rapidly down to ambient values. Therefore, the forces withstood by explosion resistant products are of an impulsive type and not of a semi-static type such as those that can be simulated in test chambers.
- Moreover, if the real environment in which an explosion occurs has apertures or is broken resulting in apertures towards surrounding environments, negative pressure conditions may also be established due to the escape of the gases generated by the explosion through these apertures. Therefore, explosion resistant products installed in real environments may be subjected to forces of an impulsive type even having opposite directions during the same explosion.
- All these types of forces can not be simulated in known test chambers.
- Another problem of the test chambers currently used is that explosions simulated under substantially static conditions lead to excessively oversize explosion resistant products, which negatively influences the manufacturing costs.
- It is therefore an object of the present invention to provide a test chamber for explosion resistant products, which allows to overcome these disadvantages. Said object is achieved with a test chamber, whose main features are disclosed in the first claim, while other features are disclosed in the remaining claims.
- An idea of solution to the technical problem of making test chambers allowing to simulate the pressure conditions of a real explosion is to provide the walls of a test chamber with a plurality of portions that are selectively removable and suitable to put into communication the inner volume of the chamber with the external environment surrounding it. In this way it is possible to simulate the effects of an explosion in real environments that, due to their nature, are not hermetic, thus advantageously allowing to reproduce the main characteristics of the environment in which the explosion resistant products will be installed and to test their real behavior.
- Another advantage offered by the invention is that the possibility to simulate non-hermetic environments allows to design explosion resistant products according to their real intended use, thus avoiding an unneeded and expensive oversizing thereof.
- Moreover, the possibility to configure the test chamber with apertures having a predefined size allows to evaluate at the same time the probability that the tested products be broken and the risks for the external environment surrounding the chamber, these parameters being both considered by the present standards.
- Still another advantage of the test chamber according to the invention is that the explosive charge inserted into the chamber is enclosed in a special hermetic container arranged therein, inside which it is possible to generate explosive atmospheres having controlled temperature, pressure and humidity, thus contributing to achieve test conditions that are comparable not only to the structural characteristics of the real environment, but also to the climatic characteristics thereof.
- Further advantages and features of the test chamber according to the present invention will become clear to those skilled in the art from the following detailed and non-limiting description of an embodiment thereof with reference to the attached drawings, wherein:
-
figure 1 is a perspective view showing a test chamber according to the present invention on which an explosion resistant panel is mounted; -
figure 2 is a perspective view showing a cross-section of the test chamber offigure 1 taken along line II-II offigure 1 ; and -
figure 3 is a perspective view showing a longitudinal section of the test chamber offigure 1 taken along line III-III offigure 1 . - Referring to
figure 1 , thetest chamber 1 according to the invention consists of a container open on one side and comprising on said openside connecting means 2 suitable to allow to air-tightly assemble an explosion resistant product, e.g. apanel 3. - The
connecting means 2 may e.g. compriseguides 2a and, where necessary, also adaptingmembers 2b allowing to close possible openings present between the product to be tested and the inner volume of thechamber 1. - The
test chamber 1 comprises a plurality ofside walls 4, afloor 5 and aceiling 6 so configured to withstand the explosions simulated therein without being deformed. For this purpose, these walls may e.g. comprise a plurality ofribs 7 that are internally and externally coated bypanels 8, 8'. Theribs 7 and thepanels 8, 8' may be coupled to each other by arranging a dissipating material therebetween, so as to absorb the impulsive forces generated by the explosions simulated in thetest chamber 1. Moreover, the inner spaces present between the inner andouter panels 8, 8' are preferably filled with materials suitable to absorb shocks, such as e.g. sand. In this way it is possible to spread the stresses generated by the explosions in a more uniform way and to achieve a higher degree of energy dissipation, thus contributing to ensure the safety of the chamber structure. - At least one of the
side walls 4,floor 5 andceiling 6 of thetest chamber 1 according to the invention comprises a plurality of selectively removable portions suitable to put into communication the inner volume of thechamber 1 with the external environment surrounding it. - Referring to the embodiment shown in
figure 1 , theceiling 6 of the test chamber comprises only an inner coating comprising a plurality ofportions 9 that are selectively removable in order to put into communication the inner volume of thechamber 1 with the external environment surrounding it. - Similarly to the other walls of the test chamber, the
removable portions 9 are in the form of slats connectable to theribs 7 of theceiling 6 such as the inner coating panels 8'. - It is understood that by varying the number and the arrangement of the
removable portions 9 it is possible to create not only one or a number of apertures having a predefined surface area, but also particular geometries of the escape passages for the gases generated by an explosion, so as to allow to reproduce the main characteristics of the environment in which the products to be tested will be installed. - According to the degree of opening of the chamber defined by the
removable portions 9 it is be possible to modify the time pressure needs to reach a peak value, as well as the value of the pressure peak that can be reached during the test, thus being generally possible to influence the pressure trend over time by acting on the parameters indicated in the various standards in the field, surface areas and volumes in particular. - According to another aspect of the invention, the explosive charge needed to simulate explosions in the test chamber is placed into a
hermetic container 10 arranged inside thechamber 1, thus advantageously allowing to avoid any influence from the environment external to the chamber on the explosive charge. - Referring to the embodiment shown in
figures 2 and3 , thehermetic container 10 has a substantially spherical shape and is connected to thetest chamber 1, e.g. on thefloor 5, by way of a suitable supportingmember 11. Thecontainer 10 is preferably made of a plastic material, such e.g. PA, suitable to house the inflammable substances that form the explosive charge until when an explosion is triggered and to be broken once a predefined pressure and/or temperature threshold is exceeded. Depending on the requirements and the amount of explosive charge needed for the test, thecontainer 10 may possibly be provided with a plurality of ribs (not shown) allowing to improve its structural rigidity. It is understood that the pressure and/or temperature threshold beyond which thehermetic container 10 is broken may be designed either according to minimum pressure and/or temperature values, e.g. slightly higher than ambient pressure and temperature, or for much higher values according to the conditions of the real environment to be simulated. In the latter case, it is possible to carry out explosion resistance tests characterized by the so-called "domino effect", i.e. tests in which the explosion initially occurs within a small environment that can be simulated by thehermetic container 10, and only subsequently reaches the environment in which the products to be tested are arranged. - During the preparation of a test one or a number of inflammable substances are introduced into the
container 10 and subsequently mixed with air in predefined amounts so as to obtain an explosive charge under predefined temperature, pressure and humidity conditions. The ignition of the charge so prepared occurs by way of a triggering device (not shown) arranged on the supportingmember 11 and remotely controlled. - The supporting
member 11 may advantageously be internally hollow, thus allowing to easily supply air and inflammable substances into thecontainer 10. - Moreover, possible sensors suitable to allow to control the temperature, pressure and humidity conditions of the explosive charge may be arranged on the supporting
member 11. - It is clear that the above-described embodiment of the test chamber according to the invention is only an example susceptible of numerous variants. For example, the
hermetic container 10 may have any shape, provided that it can contain the explosive charges needed for the tests. Moreover, thehermetic container 10 must not necessarily be restrained to thetest chamber 1, but may simply be placed on thefloor 5 and provided with one or more closable apertures suitable to allow to introduce the explosive charges. Furthermore, in order to control the forces transmitted to the ground, it is possible to suspend thetest chamber 1 by using a plurality of damping members, such as e.g. springs and/or dampers, thus allowing to simulate also the conditions in which the environment inside which the explosion occurs is restrained to the surrounding structure and/or environment. In addition, thetest chamber 1 may be provided with further pressure, temperature and humidity sensors connected to data acquisition systems suitable to carry out a real time monitoring of the tests.
Claims (8)
- A test chamber (1) for explosion resistant products, said test chamber (1) consisting of a container open on one side and comprising connecting means (2) suitable to allow to air-tightly assemble an explosion resistant product (3) on said open side, the test chamber (1) further comprising a plurality of side walls (4), a floor (5) and a ceiling (6) so configured as to withstand the explosions occurring therein without being deformed, characterized in that at least one among said side walls (4), floor (5) and ceiling (6) comprises a plurality of selectively removable portions (9) suitable to put into communication the inner volume of the chamber (1) with the external environment surrounding it.
- A test chamber according to the previous claim, characterized in that the walls (4, 5, 6) comprise a plurality of ribs (7).
- A test chamber according to the previous claim, characterized in that the walls (4, 5) without removable portions (9) are internally and externally coated with panels (8, 8').
- A test chamber according to claim 2, characterized in that the removable portions (9) are in the form of slats connectable to the ribs (7).
- A test chamber according to any of the previous claims, characterized by further comprising in its inside a hermetic container (10) suitable to contain an explosive charge, said hermetic container (10) being restrained to the test chamber (1) by means of a supporting member (11).
- A test chamber according to the previous claim, characterized in that said supporting member (11) is internally hollow and suitable to allow to supply inflammable substances and air required for the preparation of the explosive charge within the hermetic container (10).
- A test chamber according to claim 5 or 6, characterized in that the supporting member (11) is provided with a triggering device of the explosive charge as well as with temperature, pressure and humidity sensors.
- A test chamber according to any of claims 5 to 7, characterized in that the hermetic container (10) is made of a plastic material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2010A000280A IT1398315B1 (en) | 2010-02-23 | 2010-02-23 | TEST ROOM FOR EXPLOSION-RESISTANT PRODUCTS. |
PCT/EP2011/051972 WO2011104126A1 (en) | 2010-02-23 | 2011-02-10 | Test chamber for explosion resistant products |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2539684A1 EP2539684A1 (en) | 2013-01-02 |
EP2539684B1 true EP2539684B1 (en) | 2013-12-04 |
Family
ID=42734010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11702474.5A Active EP2539684B1 (en) | 2010-02-23 | 2011-02-10 | Test chamber for explosion resistant products |
Country Status (4)
Country | Link |
---|---|
US (1) | US20120312076A1 (en) |
EP (1) | EP2539684B1 (en) |
IT (1) | IT1398315B1 (en) |
WO (1) | WO2011104126A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8707764B1 (en) * | 2011-12-28 | 2014-04-29 | The United States Of America As Represented By The Secretary Of The Army | Assembly and method for standardized insensitive munitions testing |
EP2645076B1 (en) * | 2012-03-28 | 2017-02-08 | Sälzer GmbH | Method and device for testing a laminar construction element for resistance to pressure |
CN102889972B (en) * | 2012-09-28 | 2015-04-01 | 浙江华电器材检测研究所 | Swinging fatigue test device for connection reliability of operation platform |
EP2840377B1 (en) * | 2013-08-21 | 2016-09-21 | Sälzer GmbH | Method and device for testing a laminar construction element for resistance to pressure |
CN112414873B (en) * | 2020-12-18 | 2023-11-14 | 天津博迈科海洋工程有限公司 | Quality performance detection system for fireproof and antiknock door of modules in arctic region |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2659235A (en) | 1952-02-16 | 1953-11-17 | Janke And Company | Explosive atmosphere test chamber |
US6173662B1 (en) * | 1995-12-29 | 2001-01-16 | John L. Donovan | Method and apparatus for containing and suppressing explosive detonations |
DE19617697C2 (en) * | 1996-05-03 | 1999-04-01 | Recycon Gmbh | Dust explosion container with a defined volume |
US7406806B2 (en) | 2003-12-17 | 2008-08-05 | Gerald Hallissy | Blast resistant prefabricated wall units |
-
2010
- 2010-02-23 IT ITMI2010A000280A patent/IT1398315B1/en active
-
2011
- 2011-02-10 WO PCT/EP2011/051972 patent/WO2011104126A1/en active Application Filing
- 2011-02-10 EP EP11702474.5A patent/EP2539684B1/en active Active
- 2011-02-10 US US13/579,801 patent/US20120312076A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20120312076A1 (en) | 2012-12-13 |
IT1398315B1 (en) | 2013-02-22 |
EP2539684A1 (en) | 2013-01-02 |
WO2011104126A1 (en) | 2011-09-01 |
ITMI20100280A1 (en) | 2011-08-24 |
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